An-Nisa 4:137

Inna allatheena amanoo thummakafaroo thumma amanoo thumma kafaroo thumma izdadookufran lam yakuni Allahu liyaghfira lahum walaliyahdiyahum sabeela

Indeed, those who have believed then disbelieved, then believed then disbelieved, and then increased in disbelief - never will Allāh forgive them, nor will He guide them to a way.

Surely, those who believed and then disbelieved, believed again and then disbelieved, then went on increasing in their disbelief - Allah is not to forgive them nor lead them on the path.